Pneumatic cylinder-cock.



0. E. EVANS.

PNEUMATIC CYLINDER COCK. APPLICATION FILED SEPT- I5, 1914.

1, 1 89,078. Patented June 27, 1916..

OWEN E. EVANS, OF EL DORADO,.ARKANSAS.

PNEUMATIC CYLINDER-COCK.

Specification of Letters Patent.

Application filed September 15, 1914. Serial N 0. 861,868.

To all whom it may concern:

Be it known that I, OWEN E. EVANS, a citizen of the United States, residing at El Dorado, in the county of Union and State of Arkansas, have invented new and useful Improvements in Pneumatic Cylinder-Cocks, of which the following is a specification.

This invention relates to pneumatic cylinder cocks, the object in view being to provide a cylinder cock especially designed for use in connection with the cylinders of locomotives, the same being adapted to be operated by compressed air taken from the main reservoir of the air system and controlled from the cab, the said cock being used for the purpose of removing water from the cylinder or cylinders of the engine.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated and claimed.

In the accompanying drawings :Figure 1 is a vertical longitudinal section through the pneumatic cylinder cock of this invention. Fig. 2 is a plan view of another form of connection between the cylinder cock and the engine cylinder. Fig. 3 is a diagrammatic view illustrating the controlling means.

The cylinder cock contemplated in this invention comprises a compressed air cylinder 1 and a valve chamber 2 having their major axes arranged in parallel relation to each other, said cylinder and valve chamber being connected by an integral neck 3 which is provided with an air inlet port 4: to receive air through a suitable connection from the main reservoir 5 of the air system, 6 designating an air passage leading from the inlet 1- to an intake port 7 in the cylinder 1 adjacent to the cylinder head 8.

Mounted for reciprocatory movement in the cylinder 1 is an air piston 9 shown as provided with the usual piston rings 10 and having a rod 11 which extends through an opening 12 in the bottom cylinder head 13 where it has attached thereto a clevis 14 preferably threaded thereon as at 15.

16 designates a coiled expansion spring for returning the piston 9 to its initial position. The cylinder head 8 is preferably formed with an annular air distributing channel 17 and a central stop 18 against which a corresponding stop or projection 19 on the upper side of the piston 9 bears when the piston has been returned to its initial position by the spring 16.

The valve chamber 2 has its lower end bored and threaded as at 20 to receive a valve cage 21 which is detachably screwed therein as shown, said cage being provided with a lateral water outlet port 22 to the atmosphere. Slidingly mounted in the cage 21 is a water outlet valve 23 of the fourwinged type, said valve being normally held closed by steam pressure. The means for opening the valve 23 to allow the water to be blown out consists of a valve operating lever 2% which is pivotally connected at 25 to the clevis 1 1 above referred to. This lever is fulcrumed at 26 on a fulcrum stand 27 extending from the neck 3 of the body of the cock, said lever having a rounded end portion 28 which works in contact with the correspondingly rounded extremity of the stem 29 of the valve 23.

Under the arrangement shown in Fig. 1, the upper end of the valve chamber 2 is enlarged as shown at30 and internally threaded to enable the same to receive a nipple to be screwed into the engine cylinder. In lieu of said connections, however, the coupling flange 31 shown in Fig. 2 may be employed, said flange being provided with holes 32 for bolts or cap screws and having a ground ball joint 33 adapted to receive a ball ring to effect a tight connection with the engine cylinder. The device as a whole is attached to the cylinder at the upper end of the valve chamber 2 so that the water from the cylinder passes directly downwardly into said valve chamber and when the valve 23 is unseated escapes through the outlet 22.

The pneumatic cylinder cock hereinabove described may be controlled by a three-way valve 34 located at some convenient place in the engineers cab. When it becomes necessary to let the water out of the cylinders, air is turned on in the cab and enters the inlet port 4. passing therethrough into the air cylinder 1 and forcing the piston 9 down- 7 wardly thereby operating the lever 24 and lifting the water outlet valve 23. When the Patented. June 27, 1916.

three-way valve is closed in the cab, the

spring 16 acts to restore the piston to its initial position.

What I claim is A pneumatic cylinder cook the body of which comprises a water outlet chamber at onev end having an outlet in the bottom' lever acting on the stem of said outlet valve, :Eulcrumed on said stand and actuated by said piston rod, the air piston being provided with a central projection which contacts with the head of the air cylinder to preclude the closure of said air inlet.

In testimony whereof I aflix my signature 20 in presence of two witnesses.

OWEN E. EVANS.

Witnesses:

EMIL B. Pnmass, FRANCIS M. HARPER.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents! Washington, D. 0. 

